65643371056 has 20 divisors (see below), whose sum is σ = 134665445592. Its totient is φ = 30890998016.

The previous prime is 65643371033. The next prime is 65643371077. The reversal of 65643371056 is 65017334656.

It is a junction number, because it is equal to n+sod(n) for n = 65643370997 and 65643371015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120667690 + ... + 120668233.

Almost surely, 2^65643371056 is an apocalyptic number.

It is an amenable number.

65643371056 is an abundant number, since it is smaller than the sum of its proper divisors (69022074536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65643371056 is a wasteful number, since it uses less digits than its factorization.

65643371056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241335948 (or 241335942 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 65643371056 in words is "sixty-five billion, six hundred forty-three million, three hundred seventy-one thousand, fifty-six".